Yakuza

As the title says, i'm looking for manga that includes Yakuza. I wouldn't mind shoujo or shounen. I've read Tokyo Crazy Paradise, and another shoujo title whose name escapes me.Well, thanks in advance.

Then theres also Sanctuary , but i havent read it yet, so i cant say too much on it. Then theres Mai the Psychic Girl, which has a evil organization after her in it, that are kinda like the mafia i guess.